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Journal articles on the topic 'Low cycle fatigue'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 June 2024

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1

Kim, Younghune, and Woonbong Hwang. "High-Cycle, Low-Cycle, Extremely Low-Cycle Fatigue and Monotonic Fracture Behaviors of Low-Carbon Steel and Its Welded Joint." Materials 12, no. 24 (December 9, 2019): 4111. http://dx.doi.org/10.3390/ma12244111.

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Low-carbon steels are commonly used in welded steel structures and are exposed to various fatigue conditions, depending on the application. We demonstrate that the various transitions in the fracture mode during fatigue testing can be distinguished by their different cyclic response curves and microstructural features after fracture. Fractography, surface damage micrographs, and microstructural evolution clearly indicated the transition of the fracture modes from high-cycle to low-cycle, extremely low-cycle fatigue, and monotonic behavior. The high-cycle fatigue mode showed initial cyclic softening, followed by cyclic stabilization, and showed inclusion-induced crack initiation at fish-eyes, while the low-cycle fatigue mode showed initial cyclic hardening followed by cyclic stabilization, where fractography images showed obvious striations. In addition, the extremely low-cycle fatigue mode showed no cyclic stabilization after initial cyclic hardening, which was characterized by quasi-cleavage fractures with a few micro-dimples and transgranular cracking, while the monotonic fracture mode predominantly showed micro-dimples.

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2

Mao, Ping Li, Zheng Liu, Yang Li, and Li Jia Chen. "Low Cycle Fatigue Behavior of As-Extruded AZ31 Magnesium Alloy." Materials Science Forum 686 (June 2011): 202–7. http://dx.doi.org/10.4028/www.scientific.net/msf.686.202.

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The investigation on fatigue behavior and fracture surfaces of fatigued specimens of as-extruded AZ31 magnesium alloy can provide a reliable theoretical foundation for both fatigue resistant design and reasonable application of magnesium alloys. Through total-strain-amplitude controlled fatigue tests and analysis on fracture surfaces of fatigued specimens, the behavior of cyclic stress response and fatigue life as well as fracture mechanism were identified for as-extruded AZ31 magnesium alloy. The experimental results show that the extruded AZ31 alloy exhibits significant cyclic strain hardening, the relation between elastic strain amplitude, plastic strain amplitude and reversals to failure can be described by Basquin and Coffin-Manson equations respectively. In addition, it has been found that fatigue cracks initiate and propagate in a transgranular mode.

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3

Abdel Wahab, Magd, Irfan Hilmy, and Reza Hojjati-Talemi. "On the Use of Low and High Cycle Fatigue Damage Models." Key Engineering Materials 569-570 (July 2013): 1029–35. http://dx.doi.org/10.4028/www.scientific.net/kem.569-570.1029.

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In this paper, Continuum Damage Mechanics (CDM) theory is applied to low cycle and high cycle fatigue problems. Damage evolution laws are derived from thermodynamic principles and the fatigue number of cycles to crack initiation is expressed in terms of the range of applied stresses, triaxiality function and material constants termed as damage parameters. Low cycle fatigue damage evolution law is applied to adhesively bonded single lap joint. Damage parameters as function of stress are extracted from the fatigue tests and the damage model. High cycle fatigue damage model is applied to fretting fatigue test specimens and is integrated within a Finite Element Analysis (FEA) code in order to predict the number of cycles to crack initiation. Fretting fatigue problems involve two types of analyses; namely contact mechanics and damage/fracture mechanics. The high cycle fatigue damage evolution law takes into account the effect of different parameters such as contact geometry, axial stress, normal load and tangential load.

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4

SHI, Jin-yuan, Yong WANG, Wang-fan LI, Zhi-cheng DENG, and Yu Yang. "ICOPE-15-C035 Crack Propagation Life under Low Cycle Fatigue and High Cycle Fatigue of Nuclear Steam Turbine Rotors." Proceedings of the International Conference on Power Engineering (ICOPE) 2015.12 (2015): _ICOPE—15——_ICOPE—15—. http://dx.doi.org/10.1299/jsmeicope.2015.12._icope-15-_131.

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5

Nikulin, Sergey A., Stanislav O. Rogachev, Vladislav A. Belov, Mikhail Y. Zadorozhnyy, Nikolay V. Shplis, and Mikhail M. Skripalenko. "Effect of Prolonged Thermal Exposure on Low-Cycle Bending Fatigue Resistance of Low-Carbon Steel." Metals 12, no. 2 (February 4, 2022): 281. http://dx.doi.org/10.3390/met12020281.

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Using a dynamic mechanical analyzer, the comparative studies of a low-cycle bending fatigue were carried out for AISI 1022 low-carbon steel after extreme thermal exposure, simulating the severe beyond-design-basis accident at nuclear power plants. In the as-delivered state, the steel has a high resistance to low-cycle fatigue (the fatigue strength at N = 3.5 × 104 cycles (σNf) was 360 MPa). Long-term thermal exposure led to a slight decrease in the resistance to low-cycle fatigue of steel: σNf is decreased by 9%. The influence of AISI 1022 steel structure on the characteristics of fatigue strength and fracture mechanisms is analyzed.

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6

Šulák, Ivo, Karel Obrtlík, and Ladislav Čelko. "High Temperature Low Cycle Fatigue Characteristics of Grit Blasted Polycrystalline Ni-Base Superalloy." Key Engineering Materials 665 (September 2015): 73–76. http://dx.doi.org/10.4028/www.scientific.net/kem.665.73.

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The present work is focused on the study of low cycle fatigue behavior of grit blasted nickel-base superalloy Inconel 713LC (IN 713LC). Grit blasting parameters are obtained. Button end specimens of IN 713LC in as-received condition and with grit blasted surface were fatigued under strain control with constant total strain amplitude in symmetrical cycle at 900 °C in air. Hardening/softening curves, cyclic stress-strain curve and fatigue life data of both materials were obtained. Both materials exhibit the same stress-strain response. It has not been observed any improvement or reduction of low cycle fatigue life in representation of total strain amplitude versus number of cycles to failure of grit blasted material in comparison with as-received material. Surface relief and fracture surface were observed in SEM. The little effect of surface treatment on fatigue characteristics is discussed.

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7

Fujita, Masanari, and Kenzo Miura. "Inverter and Low Cycle Fatigue." Journal of The Japan Institute of Marine Engineering 44, no. 5 (2009): 834. http://dx.doi.org/10.5988/jime.44.834.

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8

Halama, Radim, Martin Fusek, Ludmila Adámková, and František Fojtík. "Low-Cycle Fatigue of Aa2124t851." Transactions of the VŠB - Technical University of Ostrava, Mechanical Series 62, no. 1 (September 30, 2016): 17–24. http://dx.doi.org/10.22223/tr.2016-1/2007.

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9

Aoki, Yasuhiro, Mikiya Arai, Hao Zhou, Yoshikazu Ro, and Hiroshi Harada. "Low cycle fatigue of superalloys." Materials Testing 46, no. 10 (October 2004): 531–33. http://dx.doi.org/10.3139/120.100620.

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10

Dufailly, J., and J. Lemaitre. "Modeling Very Low Cycle Fatigue." International Journal of Damage Mechanics 4, no. 2 (April 1995): 153–70. http://dx.doi.org/10.1177/105678959500400204.

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11

Meininger, J. M., and J. C. Gibeling. "Low-cycle fatigue of niobium." Metallurgical Transactions A 23, no. 11 (November 1992): 3077–84. http://dx.doi.org/10.1007/bf02646126.

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12

Rodriguez, P., and S. L. Mannan. "High temperature low cycle fatigue." Sadhana 20, no. 1 (February 1995): 123–64. http://dx.doi.org/10.1007/bf02747287.

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13

Bathias, Claude, and Chong Wang. "Initiation from Low Cycle Fatigue to Gigacycle Fatigue." Advanced Materials Research 891-892 (March 2014): 1419–23. http://dx.doi.org/10.4028/www.scientific.net/amr.891-892.1419.

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This paper is devoted to the initiation of fatigue crack in Armco iron from low cycle fatigue to gigacycle fatigue. It is shown that the basic mechanisms of initiation are very similar from a physical point of view: PSB and Grain boundary cracking. But the mechanical aspect is specific in LCF and in GCF.

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14

MORINO, Kazuhiro, Futoshi NISHIMURA, and Hironobu NISITANI. "Study of Fatigue Damage on Low Cycle Fatigue." Transactions of the Japan Society of Mechanical Engineers Series A 65, no. 633 (1999): 1087–92. http://dx.doi.org/10.1299/kikaia.65.1087.

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15

Peng, Zi Chao, Jun Ying Sheng, Xu Qing Wang, and Yue Tang. "Low Cycle Fatigue Properties of FGH720Li Superalloy." Materials Science Forum 1035 (June 22, 2021): 292–96. http://dx.doi.org/10.4028/www.scientific.net/msf.1035.292.

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Low cycle fatigue (LCF) properties of a powder metallurgy(PM) nickel base superalloy FGH720Li were systematically studied in this work, including smooth LCF and notched LCF tested at various temperatures and different stress. The relationship between the fatigue life and applied stress was analyzed both for smooth fatigue and notch fatigue tests. The effects of loading frequency and stress ratio on LCF behavior were also studied. As an important influencing factor of the fatigue life in powder metallurgy superalloy, the effect of inclusions on LCF life was also investigated. The results showed that the fatigue properties of FGH720Li alloy was excellent, when tested at the temperature of 450°C and applied stress of 1230MPa, the fatigue life could exceed 5×104 cycles. When tested at 650°C and 1150MPa, the average fatigue life was still beyond 2×105 cycles.

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16

Calabrese, Angelo Savio, Tommaso D’Antino, Pierluigi Colombi, and Carlo Poggi. "Low- and High-Cycle Fatigue Behavior of FRCM Composites." Materials 14, no. 18 (September 18, 2021): 5412. http://dx.doi.org/10.3390/ma14185412.

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This paper describes methods, procedures, and results of cyclic loading tensile tests of a PBO FRCM composite. The main objective of the research is the evaluation of the effect of low- and high-cycle fatigue on the composite tensile properties, namely the tensile strength, ultimate tensile strain, and slope of the stress–strain curve. To this end, low- and high-cycle fatigue tests and post-fatigue tests were performed to study the composite behavior when subjected to cyclic loading and after being subjected to a different number of cycles. The results showed that the mean stress and amplitude of fatigue cycles affect the specimen behavior and mode of failure. In high-cycle fatigue tests, failure occurred due to progressive fiber filaments rupture. In low-cycle fatigue, the stress–strain response and failure mode were similar to those observed in quasi-static tensile tests. The results obtained provide important information on the fatigue behavior of PBO FRCM coupons, showing the need for further studies to better understand the behavior of existing concrete and masonry members strengthened with FRCM composites and subjected to cyclic loading.

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17

Wu, Liang Chen, and Dong Po Wang. "Investigation of High Cycle and Low Cycle Fatigue Interaction on Fatigue Behavior of Welded Joints." Applied Mechanics and Materials 217-219 (November 2012): 2101–6. http://dx.doi.org/10.4028/www.scientific.net/amm.217-219.2101.

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Samples of Q345 steel welded joints were tested to failure under low cycle fatigue(LCF),high cycle fatigue(HCF) and combined fatigue(CCF) using an apparatus that is capable of providing interactive LCF/HCF loading. The stress ratio R is 0.5 and the frequency of HCF is about 19kHz. The result indicates that not only high frequency minor cycles superimposed on low frequency major cycles , but also low frequency minor cycles superimposed on high frequency major cycles can do remarkable damage to fatigue performance of welded joints. The CCF strength is characterized by amplitude envelope. If CCF fatigue life is characterized by LCF life, adverse effect of HCF component is underestimated. If CCF fatigue life is characterized by HCF life, adverse effect of LCF component is overrated.

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18

Matikas, T. E. "A high-cycle fatigue apparatus at 20 kHz for low-cycle fatigue/high-cycle fatigue interaction testing." Fatigue & Fracture of Engineering Materials & Structures 24, no. 10 (October 2001): 687–97. http://dx.doi.org/10.1046/j.1460-2695.2001.00427.x.

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19

OGAWA, Fumio. "Report of Eighth International Conference on Low Cycle Fatigue." Journal of the Society of Materials Science, Japan 66, no. 11 (2017): 868. http://dx.doi.org/10.2472/jsms.66.868.

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20

Lanning, D., G. K. Haritos, T. Nicholas, and D. C. Maxwell. "Low-cycle fatigue/high-cycle fatigue interactions in notched Ti-6Al-4V*." Fatigue & Fracture of Engineering Materials & Structures 24, no. 9 (September 28, 2001): 565–77. http://dx.doi.org/10.1046/j.1460-2695.2001.00411.x.

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21

Huang, Zhiyong, Qingyuan Wang, Danièle Wagner, and Claude Bathias. "Effect of low cycle fatigue pre-damage on very high cycle fatigue." Theoretical and Applied Mechanics Letters 2, no. 3 (2012): 031007. http://dx.doi.org/10.1063/2.1203107.

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22

Takahashi, Takehiko, Susumu Hioki, Ikuo Shohji, and Osamu Kamiya. "Low Cycle Fatigue Behavior and Surface Feature by Image Processing of Sn-0.7Cu Lead-Free Solder." Key Engineering Materials 306-308 (March 2006): 115–20. http://dx.doi.org/10.4028/www.scientific.net/kem.306-308.115.

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The low-cycle fatigue behavior on Sn-0.7Cu lead-free solder as-cast and Sn-Pb eutectic solder as-cast were investigated at a strain rate 0.1%/s under various temperatures of 25, 80 and 120oC. In addition, the relationships between the surface feature in the low-cycle fatigue test and low-cycle fatigue life of those solders at 25oC were investigated by image processing. The low-cycle fatigue life of Sn-0.7Cu decreased when the temperature increased. And the fatigue life of Sn-0.7Cu was better than that of the Sn-Pb eutectic solder at the temperatures of 25 and 80oC. The low-cycle fatigue behavior on the solders investigated followed Coffin-Manson equation. The fatigue ductility coefficient of Sn-0.7Cu was found to be affected by the temperature. The surface deformation as fine meshes in the low-cycle fatigue test of Sn-0.7Cu did not appear until 10% of the fatigue life. Although it was over 10% of the fatigue life, the surface deformation that was caused by micro cracks and coalesces occurred with the increasing number of cycles. The relationships between the surface feature in the low-cycle fatigue test and the low-cycle fatigue life on Sn-0.7Cu and Sn-37Pb solders were discussed.

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23

Liu, Yong Jie, Qing Yuan Wang, Ren Hui Tian, and Xiao Zhao. "Low Cycle Tension-Tension Fatigue Properties of 316L Stainless Steel Thin Sheets." Applied Mechanics and Materials 138-139 (November 2011): 832–35. http://dx.doi.org/10.4028/www.scientific.net/amm.138-139.832.

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In this paper, tensile fatigue properties of 316L stainless steel thin sheets with a thickness of 0.1 mm are studied. The tests are implemented by using micro mechanical fatigue testing sysytem (MMT-250N) at room temperature under tension-tension cyclic loading. The S-N curve of the thin sheets descends continuously at low cycle region. Cyclic σ-N curve and ε-N curve are obtained according to the classical macroscopical fatigue theory. The results agree well with the experimental fatigue data, showing that the traditional fatigue research methods are also suitable for description of MEMS fatigue in a certain extent. The effect factor of frequency was considered in this study and the results show that the fatiuge life and the fatigue strength are increased as loading frequency increasing.

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24

Li, Xun, Zhiyuan Guo, Shenliang Yang, Hongbin Zhang, and Ziming Wang. "Study on the Effect of Milling Surface Plastic Deformation on Fatigue Performance of 20Cr and TC17 Specimens." Metals 12, no. 5 (April 26, 2022): 736. http://dx.doi.org/10.3390/met12050736.

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In addition to the micro-topography of machined surfaces, plastic deformation is an important factor affecting the machined surface integrity and the fatigue performance of specimens. For 20Cr and TC17 materials, the effect law of milling surface plastic deformation on high- and low-cycle fatigue performance of specimens was studied. Experimental results show that the effect law of milling surface plastic deformation on high- and low-cycle fatigue performance of specimens is different. When the high-cycle fatigue life is about 2 × 105 cycles, severe surface plastic deformation can increase the maximum stress suffered by TC17 specimens from 1060 MPa to 1080 MPa; when the low-cycle fatigue life is about 6 × 104 cycles, severe surface plastic deformation can reduce the maximum stress suffered by 20Cr specimens from 680 MPa to 660 MPa. Therefore, severe surface plastic deformation can improve the high-cycle fatigue performance and, on the contrary, it has a negative effect on the low-cycle fatigue performance. Combined with the analysis of the surface integrity index and the fatigue fracture topography of specimens, it is concluded that the machined surface plastic deformation significantly reduces the plastic deformation capacity of surface layer material and enhances the stress concentration phenomenon caused by the surface micro-topography, so that when a specimen is subjected to a large load, it is very easy to make microcracks appear on the machined surface and form the “over-plastic deformation” phenomenon, resulting in a sharp decrease in the low-cycle fatigue performance of specimens. This suggests that the plastic deformation degree of machined surfaces needs to be optimized depending on the magnitude of the working load and the micro-topography.

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25

Li, Xun, Zhiyuan Guo, Shenliang Yang, Hongbin Zhang, and Ziming Wang. "Study on the Effect of Milling Surface Plastic Deformation on Fatigue Performance of 20Cr and TC17 Specimens." Metals 12, no. 5 (April 26, 2022): 736. http://dx.doi.org/10.3390/met12050736.

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In addition to the micro-topography of machined surfaces, plastic deformation is an important factor affecting the machined surface integrity and the fatigue performance of specimens. For 20Cr and TC17 materials, the effect law of milling surface plastic deformation on high- and low-cycle fatigue performance of specimens was studied. Experimental results show that the effect law of milling surface plastic deformation on high- and low-cycle fatigue performance of specimens is different. When the high-cycle fatigue life is about 2 × 105 cycles, severe surface plastic deformation can increase the maximum stress suffered by TC17 specimens from 1060 MPa to 1080 MPa; when the low-cycle fatigue life is about 6 × 104 cycles, severe surface plastic deformation can reduce the maximum stress suffered by 20Cr specimens from 680 MPa to 660 MPa. Therefore, severe surface plastic deformation can improve the high-cycle fatigue performance and, on the contrary, it has a negative effect on the low-cycle fatigue performance. Combined with the analysis of the surface integrity index and the fatigue fracture topography of specimens, it is concluded that the machined surface plastic deformation significantly reduces the plastic deformation capacity of surface layer material and enhances the stress concentration phenomenon caused by the surface micro-topography, so that when a specimen is subjected to a large load, it is very easy to make microcracks appear on the machined surface and form the “over-plastic deformation” phenomenon, resulting in a sharp decrease in the low-cycle fatigue performance of specimens. This suggests that the plastic deformation degree of machined surfaces needs to be optimized depending on the magnitude of the working load and the micro-topography.

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26

Kumai, Shinji, and Masaharu Kato. "Low Cycle Fatigue in Metallic Materials." Journal of SHM 13, no. 1 (1997): 2–10. http://dx.doi.org/10.5104/jiep1993.13.2.

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27

Kabir, S., and Tae-In Yeo. "Characterization of Low-cycle Fatigue Parameters." British Journal of Applied Science & Technology 12, no. 3 (January 10, 2016): 1–15. http://dx.doi.org/10.9734/bjast/2016/20658.

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28

Medved, Ivan, Oleksandr Pirogov, Andrey Romin, Vitalii Slovinskyi, and Galyna Venzhego. "Low Cycle Fatigue of Structural Alloys." Materials Science Forum 1038 (July 13, 2021): 3–8. http://dx.doi.org/10.4028/www.scientific.net/msf.1038.3.

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Metallurgy, mechanical engineering, energy, agriculture, food industry, energy, electronics, rocket and space technology – this is a far from complete list of areas of the national economy in which liquid cryogenic products (cryoproducts). The production volumes of such products and the scale of their use are constantly increasing. This is due to the fact that cryogenic temperatures (below 120 K) provide unique opportunities for the implementation of such physical phenomena and processes that do not manifest themselves under normal conditions, but are used very effectively in science and technology. The solution of fundamental scientific problems and applied problems of both promising and current importance is determined by the level of development of cryogenic technology and the degree of its practical application. The continuous expansion of the scale of production of liquid cryogenic products has led in recent years to a significant increase in the volume of production of systems for their storage and transportation. These systems, as a rule, are welded shell structures in execution, they are operated in difficult conditions of temperature and force effects. The share of their production in the total output of cryogenic engineering products is very significant, and the operating conditions are the most stressful in comparison with other types of cryogenic structures. For the manufacture of cryogenic shell structures, expensive non-ferrous alloys and special steels are used, the degree of consumption of which, taking into account the sufficient material consumption of such structures and the expanding scale of their production, is constantly increasing. Therefore, one of the most urgent for cryogenic mechanical engineering at present is the problem of reducing the material consumption of shell structures and increasing their reliability and durability. It is obvious that a solution to this problem for cryogenic engineering products can be achieved by improving the methods of their strength calculations based on taking into account the specific hardening effect of low temperature on structural alloys. The phenomenon of low-cycle fatigue of metals is associated with elastoplastic deformation of their macrovolumes. The kinetics of elastoplastic deformation processes under cyclic loading depends on the loading conditions and material properties, and the nature of these processes and their intensity have a decisive influence on the features of material destruction. If the accumulation of deformation is small, then the destruction, as a rule, is of a fatigue nature; quasi-static fracture (similar in appearance to fracture during static tests for short-term strength) occurs after the realization of the ultimate plasticity of the material. The task of assessing the bearing capacity and durability under cyclic loading conditions is extremely important. Under cyclic loading, a number of specific phenomena and factors that are difficult to take into account analytically arise, which are primarily associated with the development of fatigue damage, with the need to assess the cyclic and structural instability of materials [1]. Since such studies are very laborious and expensive, the problem of minimizing such experiments is currently urgent. In this paper, we investigate the possibility of using mathematical planning methods for experimental studies at cryogenic temperatures. Experiment planning is usually understood as the procedure for choosing the volume and conditions of testing necessary and sufficient to solve the problem with the required accuracy.

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29

Şerban, D. A., L. Marşavina, and N. Modler. "Low-cycle fatigue behaviour of polyamides." Fatigue & Fracture of Engineering Materials & Structures 38, no. 11 (July 17, 2015): 1383–94. http://dx.doi.org/10.1111/ffe.12333.

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30

Ingraham, M. D., C. J. DeMaria, K. A. Issen, and D. J. Morrison. "Low cycle fatigue of aluminum foam." Materials Science and Engineering: A 504, no. 1-2 (March 2009): 150–56. http://dx.doi.org/10.1016/j.msea.2008.10.045.

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31

Bentachfine, S., G. Pluvinage, J. Gilgert, Z. Azari, and D. Bouami. "Notch effect in low cycle fatigue." International Journal of Fatigue 21, no. 5 (May 1999): 421–30. http://dx.doi.org/10.1016/s0142-1123(99)00004-3.

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32

Marmy, Pierre, and Tomas Kruml. "Low cycle fatigue of Eurofer 97." Journal of Nuclear Materials 377, no. 1 (June 2008): 52–58. http://dx.doi.org/10.1016/j.jnucmat.2008.02.054.

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33

YANG, HO-YOUNG, JAE-HOON KIM, and KEUN-BONG YOO. "LOW CYCLE FATIGUE BEHAVIOR AND LIFE PREDICTION OF A CAST COBALT-BASED SUPERALLOY." International Journal of Modern Physics: Conference Series 06 (January 2012): 251–56. http://dx.doi.org/10.1142/s2010194512003261.

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Co -base superalloys have been applied in the stationary components of gas turbine owing to their excellent high temperature properties. Low cycle fatigue data on ECY-768 reported in a companion paper were used to evaluate fatigue life prediction models. In this study, low cycle fatigue tests are performed as the variables of total strain range and temperatures. The relations between plastic and total strain energy densities and number of cycles to failure are examined in order to predict the low cycle fatigue life of Cobalt-based super alloy at different temperatures. The fatigue lives is evaluated using predicted by Coffin-Manson method and strain energy methods is compared with the measured fatigue lives at different temperatures. The microstructure observing was performed for how affect able to low-cycle fatigue life by increasing the temperature.

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34

Birol, Yucel. "A low-cycle fatigue approach to fatigue crack propagation." Journal of Materials Science 24, no. 6 (June 1989): 2093–98. http://dx.doi.org/10.1007/bf02385426.

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35

Hutař, P., J. Poduška, M. Šmíd, Ivo Kuběna, A. Chlupová, L. Náhlík, J. Polák, and T. Kruml. "Short fatigue crack behaviour under low cycle fatigue regime." International Journal of Fatigue 103 (October 2017): 207–15. http://dx.doi.org/10.1016/j.ijfatigue.2017.06.002.

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36

Ebara, Ryuichiro. "Grain Size Effect on Low Cycle Fatigue Behavior of High Strength Structural Materials." Solid State Phenomena 258 (December 2016): 269–72. http://dx.doi.org/10.4028/www.scientific.net/ssp.258.269.

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This paper presents grain size effect on low cycle fatigue behavior of high strength maraging steel with gain size of 20,60 and 100μm and Ti-6Al-4V alloy with grain size of 0.5,1.4 and 5.1μm. Low cycle fatigue strength of the maraging steel depends on grain size in number of cycles up to 103.The smaller the grain size, the higher the low cycle fatigue strength was. Quasci-cleavage fracture surfaces were predominant for material with grain size of 20μm,while intergranular fracture surfaces were predominant for materials with larger grain size in number of cycles lower than 60. Striation was predominant for all tested materials in number of cycles higher than 60.Low cycle fatigue strength of Ti-6Al-4V alloy also depends on grain size in number of cycles up to 104. Grain size dependent transgranular fracture surfaces were predominant for materials with ultra-fine grain size of 0.5μm and fine grain size of 1.4μm.

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37

FARFAN, S. "High cycle fatigue, low cycle fatigue and failure modes of a carburized steel." International Journal of Fatigue 26, no. 6 (June 2004): 673–78. http://dx.doi.org/10.1016/j.ijfatigue.2003.08.022.

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38

Golański, Grzegorz, Krzysztof Werner, and Stanisław Mroziński. "Low Cycle Fatigue of GX12CrMoVNbN9 -1 Cast Steel at 600°C Temperature." Advanced Materials Research 396-398 (November 2011): 326–29. http://dx.doi.org/10.4028/www.scientific.net/amr.396-398.326.

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The paper treats of the low cycle fatigue (LCF) behaviour of GX12CrMoVNbN9-1 (GP91) cast steel after heat treatment. Fatigue tests at the temperature of 600oC within the scope of small amount of cycles to failure were carried out for five levels of controlled amplitude of total strain εac = 0.25, 0.30, 0.35, 0.50 and 0.60 %. The investigated cast steel within the scope of low cycle fatigue life reveals a three-stage course of changes in strength and strain. In the given scope of low cycle fatigue for GP91 cast steel, cyclic weakening was observed without the occurrence of stabilization period of its properties.

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39

Rajan, Sidharth, Priti Wanjara, Javad Gholipour, and Abu Syed Kabir. "Fatigue Behavior of Linear Friction Welded Ti-6Al-4V and Ti-6Al-2Sn-4Zr-2Mo-0.1Si Dissimilar Welds." Materials 14, no. 11 (June 7, 2021): 3136. http://dx.doi.org/10.3390/ma14113136.

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The use of joints fabricated from dissimilar titanium alloys allows the design of structures with local properties tailored to different service requirements. To develop welded structures for aerospace applications, particularly under critical loading, an understanding of the fatigue behavior is crucial, but remains limited, especially for solid-state technologies such as linear friction welding (LFW). This paper presents the fatigue behavior of dissimilar titanium alloys, Ti–6Al–4V (Ti64) and Ti–6Al–2Sn–4Zr–2Mo–0.1Si (Ti6242), joined by LFW with the aim of characterizing the stress versus number of cycles to failure (S-N) curves in both the low- and high-cycle fatigue regimes. Prior to fatigue testing, metallurgical characterization of the dissimilar alloy welds indicated softening in the heat-affected zone due to the retention of metastable β, and the typical practice of stress relief annealing (SRA) for alleviating the residual stresses was effective also in transforming the metastable β to equilibrated levels of α + β phases and recovering the hardness. Thus, the dissimilar alloy joints were fatigue-tested in the SRA (750 °C for 2 h) condition and their low- and high-cycle fatigue behaviors were compared to those of the Ti64 and Ti6242 base metals (BMs). The low-cycle fatigue (LCF) behavior of the dissimilar Ti6242–Ti64 linear friction welds was characterized by relatively high maximum stress values (~ 900 to 1100 MPa) and, in the high-cycle fatigue (HCF) regime, the fatigue limit of 450 MPa at 107 cycles was just slightly higher than that of the Ti6242 BM (434 MPa) and the Ti64 BM (445 MPa). Fatigue failure of the dissimilar titanium alloy welds in the low-cycle and high-cycle regimes occurred, respectively, on the Ti64 and Ti6242 sides, roughly 3 ± 1 mm away from the weld center, and the transitioning was reasoned based on the microstructural characteristics of the BMs.

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Nagy, Gyula, and János Lukács. "Connection among the Characteristics of the Low Cycle Fatigue, High Cycle Fatigue and Fatigue Crack Growth." Key Engineering Materials 345-346 (August 2007): 533–36. http://dx.doi.org/10.4028/www.scientific.net/kem.345-346.533.

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The material quality, the deformation rate, the temperature and the stress state influence mechanical behaviour and properties of different materials. Due to this great variety of the influencing factors we do not have one model of general validity describing the behaviour of materials, but we have to use a great number of material constants in order to characterize the properties. The exponents of the Manson-Coffin, the Basquin and the Paris-Erdogan laws were applied for the verification of the connection among the fatigue fracture types. Own measured values and test results can be found in the literature were used for the illustration of the connections. “Fracture surface”-s were determined for characterizing of different steel grades and their welded joints. It can be concluded that “fracture surface”-s are suitable for the describing of the fracture behaviour and the conversion of different fracture parameters of steels.

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Majerski, Krzysztof, Barbara Surowska, Jaroslaw Bienias, and Jaroslaw Szusta. "Study of low-cycle fatigue of glass-hybrid laminates." Aircraft Engineering and Aerospace Technology 90, no. 3 (April 9, 2018): 489–95. http://dx.doi.org/10.1108/aeat-09-2015-0210.

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Purpose The purpose of this study is to investigate the results of reinforcing fibre metal laminates with glass fibres under low-cycle fatigue conditions in a limited number of cycles. Design/methodology/approach The tests were carried out on open-hole rectangular specimens loaded in tension-tension at high load ranges of 80 and 85 per cent of maximum force determined in static test, correspondingly. The number of cycles for destruction has been determined experimentally. Findings By means of microscopic observations, it was possible to determine the moment of crack initiation and their growth rate. Furthermore, it was possible to identify the impact of reinforcing fibre orientation in composite layers, material creating the metal layers, on fatigue life and on nature of crack propagation. Practical implications This work validates the possibility of increasing the resistance of fibre metal laminates to low-cycle fatigue by modifying the structure of the laminate. Originality/value The resistance of fibre metal laminates on low-cycle fatigue is not widely described and the phenomena occurring during degradation are poorly understood.

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Jeong, Ill Seok, Sang Jai Kim, Taek Ho Song, and Sung Yull Hong. "Evaluation of Low-Cycle Fatigue in Simulated PWR Environment." Key Engineering Materials 326-328 (December 2006): 1011–14. http://dx.doi.org/10.4028/www.scientific.net/kem.326-328.1011.

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For developing fatigue design curve of cast stainless steel that is used in piping material of nuclear power plants, a low-cycle fatigue test rig was built. It is capable of performing tests in pressurized high temperature water environment of PWR. Cylindrical solid fatigue specimens of CF8M were used for the strain-controlled environmental fatigue tests. Fatigue life was measured in terms of the number of cycles with the variation of strain amplitude at 0.04%/s strain rates. The disparity between target length and measured length of specimens was corrected by using finite element method. The corrected test results showed similar fatigue life trend with other previous results.

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Yong Huang, Zhi, Danièle Wagner, Claude Bathias, and Jean Louis Chaboche. "Cumulative fatigue damage in low cycle fatigue and gigacycle fatigue for low carbon–manganese steel." International Journal of Fatigue 33, no. 2 (February 2011): 115–21. http://dx.doi.org/10.1016/j.ijfatigue.2010.07.008.

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Hu, Hui Bin, Li Jun Cao, Shu Xiao Chen, and Xin Wen Cao. "Stochastic Fatigue Reliability Analysis for Torsion Shaft of Military Tracked Vehicles." Applied Mechanics and Materials 543-547 (March 2014): 199–202. http://dx.doi.org/10.4028/www.scientific.net/amm.543-547.199.

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There are coupled cases of high-cycle fatigue and low-cycle fatigue in torsion shaft of military tracked vehicles. To accurately analyze the stochastic fatigue reliability of torsion shaft, a new kind of decoupling method for high-cycle fatigue and low-cycle fatigue was firstly put forward. Probability fatigue accumulation damage theory and nominal stress method were combined to analyze high-cycle fatigue. Random response surface method was adopted to fit the life distribution function for low-cycle fatigue. To obtain the high-cycle and low-cycle stochastic fatigue reliability, probability fatigue accumulation damage theory and local stress and strain method were used. Then, composite damages of torsion shaft under high-cycle fatigue and low-cycle fatigue could be achieved based on probability fatigue accumulation damage thoery.

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Tang, Zhanzhan, Zheng Chen, Zhixiang He, Xiaomei Hu, Hanyang Xue, and Hanqing Zhuge. "Experimental and Numerical Study of Combined High and Low Cycle Fatigue Performance of Low Alloy Steel and Engineering Application." Materials 14, no. 12 (June 18, 2021): 3395. http://dx.doi.org/10.3390/ma14123395.

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The fatigue behaviors of metals are different under different in-service environment and loading conditions. This study was devoted to investigating the combined effects of high and low cycle fatigue loads on the performance of the low alloy steel Q345. Three kinds of experiments were carried out, including the pure high cycle fatigue (HCF) tests, the pure low cycle fatigue (LCF) tests, and the combined high and low cycle fatigue (HLCF) tests. The prediction formulae were proposed for the combined high and low cycle fatigue failure. Scanning electron microscopy (SEM) and stereo microscope were used to analyze the microstructure and fracture morphology due to different fatigue loads. Case study on the combined high and low cycle fatigue damage of a steel arch bridge was carried out based on the FE method and the proposed formula. The results show that the LCF life decreases evidently due to the prior HCF damages. The HLCF fracture surface is relatively flat near the crack initiation side, and rugged at the other half part. The fatigue damages at the bridge joints increase significantly with consideration of the pre-fatigue damages caused by traffic load. In the 100th anniversary of service, the fatigue damage index without considering the HCF pre-damage is only about 50% of the coupled damage value.

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Li, Ai Li, Ri Gao, Ming De Sun, and Xi Meng. "Study on Low-Cycle Fatigue Life of Base Metal of the Shock Absorber." Advanced Materials Research 936 (June 2014): 1361–65. http://dx.doi.org/10.4028/www.scientific.net/amr.936.1361.

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In this paper, by experiments on the low-cycle fatigue life of groups of base metal test specimens under constant total strain control, the number of cycles to fracture failure are obtained. The measured S-N curve of base metal is established and the fitted formulas based on three low cycle fatigue life prediction models are caculated according to the test data. The relationship between the low-cycle fatigue life and strain amplitude are concluded. The results of observation show that the elastic strain effect can be negligible in the range of strain amplitudes used for the study of low-cycle fatigue (0.01-0.08). In addition, the calculation suggests that the three-parameter power function is suitable for the low-cycle fatigue life prediction of the base metal because its prediction accuracy is higher than other methods. The research provides technology supports for life prediction and engineering application of the shock absorber.

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Cui, Kaiyu, Haifeng Yang, Zhengrong Li, Guodong Wang, Hongyun Zhao, and Yuxuan Li. "Effects of V-N Microalloying on Low-Cycle Fatigue Property in the Welded Joints of Constructional Steel." Materials 16, no. 17 (August 27, 2023): 5860. http://dx.doi.org/10.3390/ma16175860.

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Low-cycle fatigue testing was carried out for the welded joints of constructional steels containing 0% V + 0.0021% N and 0.10% V + 0.0078% N, and the effects of V-N microalloying on the low-cycle fatigue property of the welded joints were investigated. The results showed that when the total strain amplitudes were 1.2%, 1.4% and 1.6%, the mean low-cycle fatigue lives of the welded joints of steel containing 0.10% V + 0.0078% N were 5050, 2372 and 1535 cycles, respectively, which were significantly higher than those of the welded joints of steel containing 0% V + 0.0021% N; however, when the total strain amplitudes increased to 1.8% and 2.0%, the mean low-cycle fatigue lives of the welded joints of steel containing 0.10% V + 0.0078% N were 575 and 367 cycles, respectively, which were gradually lower than those of the welded joints of steel containing 0% V + 0.0021% N. The reasons causing the difference of low-cycle fatigue life were explained by the dislocation structure and precipitates in the welding heat-affected zone, plastic strain energy density of the welded joints, and fatigue fracture morphology. When the low-cycle fatigue life is between 100 and 200 cycles, the cyclic toughness of the welded joint of steel containing 0.10% V + 0.0078% N is between 57.48 and 78.22 J/cm3, which is higher than that of the welded joint of steel containing 0% V + 0.0021% N, indicating that the welded joint of steel containing 0.10% V + 0.0078% N is able to absorb more energy in a seismic condition, therefore possessing better seismic resistance.

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Min, X. H., and H. Kato. "OS02W0045 Real-time measurement of ultrasonic wave in low-cycle fatigue testing." Abstracts of ATEM : International Conference on Advanced Technology in Experimental Mechanics : Asian Conference on Experimental Mechanics 2003.2 (2003): _OS02W0045. http://dx.doi.org/10.1299/jsmeatem.2003.2._os02w0045.

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Oshida, Yoshiki, and P. C. Chen. "High and Low-Cycle Fatigue Damage Evaluation of Multilayer Thin Film Structure." Journal of Electronic Packaging 113, no. 1 (March 1, 1991): 58–62. http://dx.doi.org/10.1115/1.2905367.

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A five-layered (Cu/Cr/Kapton® /Cr/Cu) metallic thin film structure was subjected to a completely reversed bending fatigue cycling with a wide ranges of applied strain amplitudes from 0.25 percent to about 30 percent. A new model for determination of the number of cycles to fatigue failure NF was proposed for single-crack and multi-crack formations. Within a strain amplitude ranging from 1 to 10 percent, a Manson-Coffin’s relationship was recognized for both the number of cycles to crack initiation NC and NF with exponents of 0.39 and 0.51, respectively. Selected fatigued test samples were further subjected to X-ray diffraction line analysis for dislocation density (ρ) calculation, which was related to the number of fatigue cycles N and strain amplitude (Δ εT) in an empirical formula. It was also found that dislocation densities accumulated up to both Nc and NF were related to applied strain amplitudes. Consequently, if applied strain amplitude is known and progressive change in dislocation density is measured, one can predict the remaining fatigue life as well as fatigue cycles which were already consumed.

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Peng, Yan, Yang Liu, Haoran Li, and Jiankang Xing. "Research on low cycle fatigue life prediction considering average strain." Materials Research Express 9, no. 1 (January 1, 2022): 016521. http://dx.doi.org/10.1088/2053-1591/ac4b4d.

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Abstract To address the difficult problems in the study of the effect of average strain on fatigue life under low-cycle fatigue loads, the effect of average strain on the low-cycle fatigue life of materials under different strain cycle ratios was discussed based on the framework of damage mechanics and its irreversible thermodynamics. By introducing the Ramberg-Osgood cyclic constitutive equation, a new low-cycle fatigue life prediction method based on the intrinsic damage dissipation theory considering average strain was proposed, which revealed the correlation between low-cycle fatigue strain life , material properties, and average strain. Through the analysis of the low-cycle fatigue test data of five different metal materials, the model parameters of the corresponding materials were obtained. The calculation results indicate that the proposed life prediction method is in good agreement with the test, and a reasonable characterization of the low-cycle fatigue life under the influence of average strain is realized. Comparing calculations with three typical low-cycle fatigue life prediction models, the new method is within two times the error band, and the prediction effect is significantly better than the existing models, which is more suitable for low-cycle fatigue life prediction. The low-cycle fatigue life prediction of different cyclic strain ratios based on the critical region intrinsic damage dissipation power method provides a new idea for the research of low-cycle fatigue life prediction of metallic materials.

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